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Finding the Fourth Proportional to 518,713.20, 778,069.80 and 144,736.20

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Solution

The fourth proportional to 518,713.20, 778,069.80 and 144,736.20 is: 217,104.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,713.20 : 778,069.80 = 144,736.20 : x
  2. Step 2: Convert to fraction form
    518,713.20/778,069.80 = 144,736.20/x
  3. Step 3: Cross multiply
    518,713.20x = 778,069.80 × 144,736.20
  4. Step 4: Simplify right side
    518,713.20x = 112,614,866,186.76
  5. Step 5: Solve for x
    x = 112,614,866,186.76/518,713.20
  6. Step 6: Final answer
    x = 217,104.30

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.